高温水解-离子色谱法同时测定进口石油焦中氟、氯、硫和氮的含量

Aiping ZHANG,Hongwei WANG,Jinhui SHI,Wei XIONG,Tao JIANG,Jianjun LI,Yahui FENG,Congguang FAN

Physical Testing and Chemical Analysis Part B:Chemical Analysis（2018）

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Abstract

采用高温水解-离子色谱法同时测定进口石油焦中氟、氯、硫和氮的含量.优化的试验条件如下:① 高温燃烧温度为1100 ℃;② 氧气流量为500 mL·min-1;③ 水蒸气蒸发量约2 mL·min-1;④ 过氧化钠的用量为0.12 g.以30 mmol·L-1氢氧化钾溶液为淋洗液,抑制型电导检测器测定.4种离子的质量浓度均在一定范围内与其对应的峰面积呈线性关系,方法的检出限(3S/N)为0.044~0.33 mg·L-1.加标回收率为80.0%~96.0%,测定值的相对标准偏差(n=6)为2.9%~18%.

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